most useful stuff like markdown is paid
i edited the xpi file to bypass this

fix:

rename foxcapture@georgemike.com.xpi to foxcapture@georgemike.com.zip and extract it
cd foxcapture@georgemike.com
cd js
find . -type f -exec sed -i 's/this\.userConfig_\.paidPro/true/g' {} +
then compress it to a .zip and rename it to foxcapture@georgemike.com.xpi again and double click it

requires payment for CSV. use "Copy table data to clipboard" to get a TSV, which you can convert to CSV

I paid the $12 to upgrade to the Pro Features so that I could save to CSV. I had a few problems and was helped by the email support. I still have some problems with site https://www.trustnet.com/fund/price-performance/t/investment-trusts
In particular:
1) Auto-paging does not work for this site.
2) In the CSV file, the first line of each page after the first duplicates the data for all the funds on the page and most lines end with hundreds of commas.